2006 Annual Science Report
University of Washington Reporting | JUL 2005 – JUN 2006
Causes of Mass Extinctions: Testing Impact Models
0 Field Sites
- We published a paper in SCIENCE (Strom, Malhotra, Ito, Yoshida, and Kring) that confirms an earlier result (in Journal of Geosphysical Research by Kring and Cohen) that indicates the Earth-Moon system was severely bombarded by asteroids approximately 3.9 billion years ago, which may have affected the origin and early evolution of life on Earth.
- We submitted an invited review (to Palaeogeography, Palaeoclimatology, and Palaeoecology by Kring) of the Cretaceous-Tertiary mass extinction event.
- We reexamined P/T boundary samples and were unable to find any evidence of impact ejecta.
- We are preparing a paper with a complete summary of our analyses of the Triassic-Jurassic mass extinction event in the Queen Charlotte Islands, Canada.
- We discovered impact ejecta in Michigan from the 1.85 billion year old Sudbury impact crater. We will be reporting a description of those impact ejecta deposits in August, 2006. These deposits will allow us to examine the effects of a Chicxulub-size impact event on a microbial world.